VLC Media Player

VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVD, Audio CD, VCD, and various streaming protocols.

Features

Simple, fast and powerful media player. 

Plays everything: Files, Discs, Webcams, Devices and Streams. 

Plays most codecs with no codec packs needed:

MPEG-2, DivX, H.264, MKV, WebM, WMV, MP3... 

Runs on all platforms: Windows, Linux, Mac OS X, Unix... 

Completely Free, 0 spyware, 0 ads and no user tracking. 

Can do media conversion and streaming.